40405747 has 2 divisors, whose sum is σ = 40405748. Its totient is φ = 40405746.

The previous prime is 40405711. The next prime is 40405751. The reversal of 40405747 is 74750404.

40405747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40405747 - 2¹⁹ = 39881459 is a prime.

It is not a weakly prime, because it can be changed into another prime (40405777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202873 + 20202874.

It is an arithmetic number, because the mean of its divisors is an integer number (20202874).

Almost surely, 2^40405747 is an apocalyptic number.

40405747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405747 is an equidigital number, since it uses as much as digits as its factorization.

40405747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 40405747 is about 6356.5515021905. The cubic root of 40405747 is about 343.1476639830.

The spelling of 40405747 in words is "forty million, four hundred five thousand, seven hundred forty-seven".